Malicious PDF — malware analysis report

Static analysis result for SHA-256 72be70ced728c0c2…

MALICIOUS

PDF

76.1 KB Created: 2021-03-13 19:29:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 62b1ecc7ceeea158ed14d7981fc9712e SHA-1: 49315ba3bb8bf360d3f74ba3ba969d3c48145586 SHA-256: 72be70ced728c0c2576f0627afe03c2cea0a5d55ccdf5c78725f3dff73dbe21c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many of which point to other PDF documents, suggesting a link farm or phishing campaign. The primary URL, 'https://lozipotod.ru/strik?utm_term=walk+through+new+house+checklist', is presented as a checklist but likely leads to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://lozipotod.ru/strik?utm_term=walk+through+new+house+checklist PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479462/normal_602af4825580e.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/ifXZ0fT/lone_survivor_netflix_canada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477630/normal_6012a3a129e25.pdfIn PDF document text
    • https://cdn.sqhk.co/zijigemeworu/hglrigF/mastercraft_boat_parts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484365/normal_5fd8bca63a51c.pdfIn PDF document text
    • https://cdn.sqhk.co/nasanoroge/ijhjhf7/best_speedometer_app_free.pdfIn PDF document text
    • https://cdn.sqhk.co/pipujevi/c6gfEge/mifakikuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378171/normal_602f21ebe35de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447096/normal_604132a88db21.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505102/normal_5ffc7154d7689.pdfIn PDF document text
    • https://cdn.sqhk.co/nogugojuri/ihbDU2w/71287957763.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/hbRngh5/vifijupozejopakewodo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c46c713f-5e69-4c64-aad4-d86f29440f76.filesusr.com/ugd/957c7b_bcf25615042a4c7593cdc8824888b96a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/17107582634.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/30230739762.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/bytearrayoutputstream_to_byte_array_android.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/cecilia_marfo_latest_worship_song.pdfIn PDF document text
    • https://5b949be5-44ef-49af-96c7-0ebaa8fe632e.filesusr.com/ugd/3402b1_909c4fb0d1c947f4b00936e6ed70aadb.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC55 5228 bytes
SHA-256: 38eef46adb131a4a8488698a57907ddc889c44219a786cb680e805701e2dac72
font_01_sfnt_off0000fe37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE37 10912 bytes
SHA-256: 50563bbab45413d60e0e53835a7bb41ee35baece74df7afb1ce0494f73ff7470

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